John Schilling, an expert on North Korean missile technology, called on the US to improve and develop its missile defence system.

He said: “The US national missile defence system in its current state is limited and unreliable, working only about half the time in tests.”

President Trump and Congress are responding by pouring money into new missile defense systems.

THE US House of Representatives has passed a bill calling for billions to be poured into the nation’s missile defence systems amid fears Kim Jong-un could use his newly developed weaponry to target military bases.

The act will see $696 billion added to the US defence budget, with $12.5 billion earmarked for missile defence programmes.